--- In
Homebrew_PCBs@yahoogroups.com, "Frank P" <qz9090@...> wrote:
>
> Ben,
> Being very new to PCB etching, I wouldn't know where to begin to look for cupric chloride. Any hints? Do you handle it the same way as FeCl?
Cupric Chloride Starts out as Hydrochloric Acid is what forms once enough copper is disolved into it. Can be started with Hydrocholoric Acid and Copper then regenrated with air/oxygen also Hydrogen Peroxide. You can also start with a little copper at a time using Hydrochloric Acid and Hydrogen Peroxide. See Adam Seychell's website should be listed in the Links section. Also Chemcut Corporation has a Technical Paper about it.
Cupric Chloride can be regenrated with oxygen so you don't need to dispose of it.
The FeCl I hear can be regenrated but I never have done it and can also become Cupric Chloride. To dispose of it I have used Baking Soda (it will foam Up) then leave it in open container till dry and then seal up and throw in the trash. Some mix it up in concrete mix to suspend it in the concrete.
Myself I normally do boards 8" x 12" using a plastic storage container, lay the board flat on the surface so it floats on top with air bubbler. I use to use my air compressor to supply the air but I aquired a Air Pump that is made for Septic Systems designed to run 24/7.
Ben